Bed sheet replacing equipment with deviation rectifying component

Abstract

The invention discloses bed sheet replacing equipment with a deviation rectifying component, and belongs to the technical field of bed sheet replacing equipment, the bed sheet replacing equipment comprises a material roller structure and a winding structure, the winding structure comprises a winding machine and two monitoring deviation rectifying assemblies arranged in a bilateral symmetry mode, and each monitoring deviation rectifying assembly comprises a grating unit and an execution unit. And a material pressing assembly for pressing the bed sheet is arranged on the material roller. In the automatic replacement process of the disposable bed sheet, whether the bed sheet deviates or not can be monitored in real time through the grating units located on the left side and the right side of the bed body, and when the deviation amount of the bed sheet in the replacement process exceeds a preset critical value and the monitoring light beams in the grating units are shielded, the bed sheet is replaced. The power unit drives the pressure applying roller to further tightly press the bed sheet, the elastic pressure applying air bag which is further extruded drives the switch unit to extend through the two driven parts, the strip-shaped static switch terminal makes contact with the dynamic elastic switch scraping piece, and the execution unit opposite to the deviation direction of the bed sheet is triggered to conduct friction traction deviation correction treatment on the bed sheet.

Description

Technical Field

[0001] The present invention relates to the technical field of bed sheet replacement equipment, and more particularly to a bed sheet replacement equipment with a deviation-correcting component. Background Art

[0002] In the medical and nursing fields, the diagnosis and treatment bed is a common instrument used in clinical treatment or examination. It is usually composed of a mattress mounted on a bed frame and a bed sheet laid on the surface of the mattress. As a medical product that comes into direct contact with the patient, the cleanliness and replacement frequency of the bed sheet are crucial to prevent cross infection. However, the traditional manual method of changing bed sheets is not only inefficient, but also increases the workload of medical staff. With the continuous advancement of medical technology and the improvement of people's requirements for the quality of medical services, automatic bed sheet replacement equipment has emerged.

[0003] For example, CN203042472U discloses an automatic bed sheet changing device for a medical examination bed, which includes a bed sheet, a driving shaft roller, a driven shaft roller, and a fixed bracket. The driving shaft roller and the driven shaft roller are respectively arranged at the two ends of the bed surface, the bed sheet is wound on the driven shaft roller, the bed sheet output from the driven shaft roller covers the bed surface, and the terminal part of the bed sheet is wound on the driving shaft roller; the device is connected to the head and foot of the bed respectively with four clips fixed to the bracket, and then tightened by bolts.

[0004] Although there are devices for automatically changing bed sheets on the market, there are still some deficiencies in practical applications. Most of the existing bed sheet changing devices do not have an automatic deviation correction function, which has led to a common problem that bed sheets are offset during the changing process. The offset of bed sheets can easily cause wrinkles on the bed. When patients lie on such a bed, they will feel the unevenness under their bodies, especially for those patients who are sensitive to touch or are physically weak. This discomfort will be more obvious, which will undoubtedly affect the patient's comfort. If the nursing staff needs to spend extra time and energy to readjust the position of the bed sheets after each bed sheet change, it will increase the physical exertion and work pressure of the nursing staff, resulting in a decrease in the efficiency and accuracy of bed sheet changing.

[0005] In view of this, we propose a bed sheet changing device with a deviation-correcting component. Summary of the invention

[0006] Technical problem to be solved: The purpose of the present invention is to provide a bed sheet changing device with a deviation-correcting component, which solves the technical problems raised in the above-mentioned background technology.

[0007] Technical solution: The technical solution of the present invention provides a bed sheet replacement device with a deviation correction component, including a bed body, a controller, a material roller structure, and a winding structure. The winding structure includes a winding machine and two monitoring and deviation correction components arranged symmetrically on the left and right. The monitoring and deviation correction components include a grating unit and an execution unit. The material roller structure includes a material roller wound with a bed sheet, and the material roller is provided with a material pressing component for pressing the bed sheet; The pressing assembly includes a fixed bracket, in which a power unit, a pressure roller and an elastic unit located between the power unit and the pressure roller are respectively arranged, the elastic unit includes an elastic pressure airbag, and passive parts are arranged on both sides of the elastic pressure airbag, a retractable and movable switch unit is connected between the two passive parts, and a dynamic elastic switch scraper and a strip-shaped static switch terminal are respectively arranged inside the switch unit; The bed sheet wound on the material roller is fixed on the roller of the winder after passing through the surface of the bed and two execution units. The two grating units are respectively located on the left and right sides of the bed sheet. When the offset bed sheet blocks the monitoring light beam of one of the grating units, the power unit drives the pressure roller to further press the bed sheet. The further squeezed elastic pressure airbag drives the switch unit to extend through two passive parts, so that the strip-shaped static switch terminal contacts the dynamic elastic switch scraper, triggering the execution unit in the opposite direction of the bed sheet offset to correct the bed sheet.

[0008] As an optional solution of the technical solution of the present invention, the power unit includes a first servo electric cylinder and a passive insulating slide; The passive insulating slide seat slides inside the fixed bracket, and one end of the first servo electric cylinder is connected to the passive insulating slide seat, and the other end is connected to the end of the inner cavity of the fixed bracket.

[0009] As an optional solution of the technical solution of the document of the present invention, the passive component includes a cover member, a strip resistor and two L-shaped forcing frames arranged symmetrically on the left and right, and the two L-shaped forcing frames are connected with elastic scrapers; The L-shaped forcing frame includes a vertical section and a horizontal section connected to the vertical section, and two elastic scrapers are respectively connected to the two horizontal sections; The elastic pressure airbag is connected between the passive insulating sliding seat and the pressure roller; Elastic reset parts are arranged on the opposite back surfaces of the two vertical sections.

[0010] As an optional solution of the technical solution of the present invention, the cover component includes an insulating outer protective shell connected to the side of the passive insulating slide away from the elastic pressure airbag; Two side fixed seats are symmetrically connected inside the insulating outer shell, and two L-shaped forced frames are located between the two side fixed seats; Two long grooves are symmetrically provided on the passive insulating sliding seat, and the vertical section and the side fixed seat on the same side pass through the long grooves corresponding to the two, and the vertical section slides horizontally in the long grooves; The two vertical sections are respectively located on the left and right sides of the elastic pressure airbag.

[0011] As an optional solution of the technical solution of the document of the present invention, the elastic reset member includes a guide column connected to the vertical section of the L-shaped forced frame, and the end of the guide column away from the vertical section is slidably inserted on the side fixed seat; The guide column is externally sleeved with a return spring connected between the vertical section and the side fixed seat, and under the elastic force of the return spring, the vertical section in the L-shaped forced frame is always in close contact with the surface of the elastic pressure airbag.

[0012] As an optional solution of the technical solution of the present invention, the strip resistor is connected to the side of the passive insulating slide away from the elastic pressure airbag, and the insulating outer protective shell is arranged outside the strip resistor; The free ends of the two elastic scrapers are both attached to the surface of the strip resistor.

[0013] As an optional solution of the technical solution of the present invention, the switch unit includes an insulating box, and an insulating cover plate is connected to the opening of the end of the insulating box; A strip-shaped static switch terminal is connected to the side of the insulating cover plate facing the inside of the insulating box; An insulating guide rod is inserted into the end of the insulating box for horizontal sliding, one end of which extends into the interior of the insulating box and is connected to a dynamic elastic switch scraper arranged opposite to the strip-shaped static switch terminal; The other end of the insulating guide rod is connected to the horizontal section of one of the L-shaped forcing frames, and the end of the insulating box away from the insulating guide rod is connected to the horizontal section of the other L-shaped forcing frame; When the return spring in the elastic return member is in an initial relaxed state, the dynamic elastic switch scraper is not in contact with the strip-shaped static switch terminal.

[0014] As an optional solution of the technical solution of the document of the present invention, the material roller in the material roller structure is connected to the bottom of one end of the bed, and the fixed bracket is connected to the material roller; The winder in the winding structure is connected to the bottom of the other end of the bed; The grating unit includes a grating fixing frame connected to one end of the bed body close to the winder, and the grating fixing frame is respectively connected to a grating transmitter and a grating receiver arranged up and down; The two grating units are respectively located on the left and right sides of the end of the bed.

[0015] As an optional solution of the technical solution of the document of the present invention, the execution unit includes a sliding frame, and a horizontal pulling roller is connected to the sliding frame; A second servo electric cylinder is connected to the side wall of the sliding frame, one end of the second servo electric cylinder away from the sliding frame is connected to the bearing frame, and one end of the bearing frame away from the second servo electric cylinder is connected to the bed body; The two sliding frames are arranged symmetrically on the left and right, and are both horizontally slidably connected to one end of the bed body close to the winding machine.

[0016] As an optional solution of the technical solution of the document of the present invention, the strip resistor and the two elastic scrapers are electrically connected to the winder; The controller is connected to the bed, and the grating receiver, the first servo electric cylinder and the second servo electric cylinder are all electrically connected to the controller.

[0017] Beneficial effects: One or more technical solutions provided in the technical solution of the present invention have at least the following technical effects or advantages: 1. During the automatic replacement of disposable bed sheets, the present invention can monitor in real time whether the bed sheets are offset through the grating units located on the left and right sides of the bed body. When the offset of the bed sheets during the replacement process exceeds the preset critical value and blocks the monitoring light beam in the grating unit, the power unit drives the pressure roller to further press the bed sheets. The further squeezed elastic pressure airbag drives the switch unit to extend through two passive parts, so that the strip-shaped static switch terminal contacts the dynamic elastic switch scraper, triggering the execution unit in the direction opposite to the offset of the bed sheets to perform friction pulling and deviation correction processing on the bed sheets, thereby avoiding the occurrence of wrinkles in the bed sheets due to offset during the replacement process, thereby improving the efficiency and accuracy of bed sheet replacement and the patient's comfort.

[0018] 2. When the grating unit detects that the bed sheet being replaced is offset, the second servo electric cylinder in the execution unit in the direction opposite to the offset of the bed sheet will continue to slowly contract, so that the horizontal pulling roller that moves horizontally will frictionally pull the bed sheet, so that the offset bed sheet will gradually and smoothly return to the correct position, thereby achieving the deviation correction processing of the offset bed sheet.

[0019] 3. Before the execution unit corrects the offset sheet, the pressing assembly further presses the sheet wound on the material roller, so that when the winding structure rolls up the sheet, the offset sheet is further pressed against the surface of the horizontal pulling roller of the correction unit. When the correction unit pulls the offset sheet in the opposite direction of the offset to correct the offset, the friction between the horizontal pulling roller and the sheet to be corrected increases. The greater friction helps to further enhance the correction effect of the execution unit on the offset sheet, thereby avoiding the situation where the sheet slips and becomes difficult to correct during the correction process due to insufficient friction between the sheet and the sheet.

[0020] 4. When changing the bed sheet, as the pressing assembly further presses the rolled bed sheet on the material roller, the elastic pressure airbag in the elastic unit between the power unit and the pressure roller is further squeezed, and the elastic pressure airbag that further undergoes elastic deformation drives the two L-shaped forcing frames to move in opposite directions, and also synchronously drives the switch unit to extend, so that the strip-shaped static switch terminal contacts the dynamic elastic switch scraper, triggering the execution unit in the opposite direction of the bed sheet deviation to correct the bed sheet, so that when the bed sheet is not deflected, the correction unit remains in a normally closed state, and no additional electrical energy is consumed, which helps to save electrical energy consumption during equipment operation.

[0021] 5. As the elastic pressure airbag undergoes further elastic deformation and drives the two L-shaped forcing frames to move in opposite directions, the elastic scrapers also move in opposite directions, so that a longer length of the strip resistor is received between the two elastic scrapers. The resistance value increases, and the current flowing through the winder decreases. The output power of the winder also decreases, and the winding speed of the winder decreases. As a result, the deviation rate of the bed sheet is slowed down during the deviation correction process of the bed sheet, making it easier for the deviation correction unit to correct the deviated bed sheet, thereby further improving the deviation correction efficiency while ensuring the deviation correction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 For the present invention Figure 1 A partial enlarged schematic diagram of part A.

[0024] Figure 3 For the present invention Figure 1 A partial enlarged schematic diagram of part B.

[0025] Figure 4 It is a side view of the overall structure of the present invention.

[0026] Figure 5 For the present invention Figure 4 A partial enlarged schematic diagram of part C in the middle.

[0027] Figure 6 It is a bottom view of the overall structure of the present invention.

[0028] Figure 7 For the present invention Figure 6 A partial enlarged schematic diagram of part D in the middle.

[0029] Figure 8 It is a structural schematic diagram of the material roller structure in the present invention.

[0030] Fig. 9 It is a partial cross-sectional view of the pressing component in the present invention.

[0031] Fig.10 For the present invention Fig. 9 A partial enlarged schematic diagram of part E in the middle.

[0032] Fig.11 For the present invention Fig.10 A partial enlarged schematic diagram of part F in the middle.

[0033] Description of the numbers in the figure: 10. Bed; 20. Controller; 301, winder; 302, grating fixing frame; 304, material roller; 305, fixing bracket; 306, first servo electric cylinder; 307, passive insulating slide; 308, pressure roller; 309, horizontal pulling roller; 310, grating receiver; 311, second servo electric cylinder; 312, slide frame; 313, grating transmitter; 314, elastic pressure airbag; 315, insulating outer shell; 316, side fixed seat; 317, L-shaped forcing frame; 318, guide column; 319, strip resistor; 320, insulating box; 321, insulating cover; 322, elastic scraper; 323, strip static switch terminal; 324, insulating guide rod; 325, dynamic elastic switch scraper. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Reference Figure 1 , Figure 2 as well as Figures 6 to 11 The embodiment of the present invention provides a bed sheet replacement device with a deviation correction component, including a bed body 10, a controller 20, a material roller structure, and a winding structure. The winding structure includes a winding machine 301 and two monitoring and correcting components arranged symmetrically on the left and right; the monitoring and correcting components include a grating unit and an execution unit; The material roller structure includes a material roller 304 wound with a bed sheet, and a material pressing component for pressing the bed sheet is provided on the material roller 304; The material pressing assembly includes a fixed bracket 305, a material roller 304 in the material roller structure is connected to the bottom of one end of the bed 10, the fixed bracket 305 is connected to the material roller 304, and a winder 301 in the winding structure is connected to the bottom of the other end of the bed 10; A power unit, a pressure roller 308 and an elastic unit located between the power unit and the pressure roller 308 are respectively arranged in the fixed bracket 305, the elastic unit includes an elastic pressure airbag 314, and passive parts are arranged on both sides of the elastic pressure airbag 314. A retractable and movable switch unit is connected between the two passive parts, and a dynamic elastic switch scraper 325 and a strip-shaped static switch terminal 323 are respectively arranged inside the switch unit; The bed sheet wound on the material roller 304 passes through the surface of the bed body 10 and two execution units and is fixed on the roller of the winder 301. The two grating units are respectively located on the left and right sides of the bed sheet. When the offset bed sheet blocks the monitoring beam of one of the grating units, the power unit drives the pressure roller 308 to further press the bed sheet. The further squeezed elastic pressure airbag 314 drives the switch unit to extend through two passive parts, so that the strip static switch terminal 323 contacts the dynamic elastic switch scraper 325, triggering the execution unit opposite to the offset direction of the bed sheet to correct the deviation of the bed sheet. The winder 301 is a prior art, which is a device that mechanically rolls the raw materials into coils. Its specific structure and use method are not described in detail here.

[0038] During the automatic replacement of disposable bed sheets, the present invention can monitor in real time whether the bed sheets are offset through the grating units located on the left and right sides of the bed body 10. When the offset of the bed sheets during the replacement process exceeds the preset critical value and blocks the monitoring light beam in the grating unit, the power unit drives the pressure roller 308 to further press the bed sheets. The further squeezed elastic pressure airbag 314 drives the switch unit to extend through two passive parts, so that the strip-shaped static switch terminal 323 contacts the dynamic elastic switch scraper 325, triggering the execution unit in the direction opposite to the direction in which the bed sheets are offset to perform friction pulling and deviation correction processing on the bed sheets, thereby avoiding the occurrence of wrinkles in the bed sheets due to the offset of the bed sheets during the replacement process, thereby improving the efficiency and accuracy of bed sheet replacement and the comfort of patients.

[0039] Reference Figure 1 , Figure 2 as well as Figures 6 to 9 , the embodiment of the present invention provides a bed sheet changing device with a deviation-correcting component, the power unit includes a first servo electric cylinder 306 and a passive insulating slide 307; The passive insulating slide 307 slides inside the fixed bracket 305 , and one end of the first servo electric cylinder 306 is connected to the passive insulating slide 307 , and the other end is connected to the end of the inner cavity of the fixed bracket 305 .

[0040] Reference Figure 1 and Figure 5 The embodiment of the present invention provides a bed sheet replacement device with a deviation-correcting component, wherein the grating unit includes a grating fixing frame 302 connected to one end of the bed body 10 close to the winder 301, and the grating fixing frame 302 is respectively connected with a grating transmitter 313 and a grating receiver 310 arranged up and down; The two grating units are respectively located on the left and right sides of the end of the bed body 10 .

[0041] Reference Figure 1 as well as Figures 3 to 6 , an embodiment of the present invention provides a bed sheet replacement device with a deviation-correcting member, wherein the execution unit includes a sliding frame 312, and a horizontal pulling roller 309 is connected to the sliding frame 312; The side wall of the sliding frame 312 is connected to a second servo electric cylinder 311, one end of the second servo electric cylinder 311 away from the sliding frame 312 is connected to a carrier frame, and one end of the carrier frame away from the second servo electric cylinder 311 is connected to the bed body 10; The two sliding frames 312 are symmetrically arranged and are both horizontally slidably connected to one end of the bed 10 close to the winder 301; The controller 20 is connected to the bed 10 , and the grating receiver 310 , the first servo electric cylinder 306 , and the second servo electric cylinder 311 are all electrically connected to the controller 20 .

[0042] After the bed sheet wound on the material roller 304 passes through the bed body 10 and two execution units arranged symmetrically on the left and right, the free end of the bed sheet is fixed on the roller of the winder 301 in the winding structure, and the winder 301 is started. The winder 301 rolls up the used disposable bed sheet and lays the new disposable bed sheet on the surface of the bed body 10 again, so as to quickly complete the bed sheet replacement operation. During the bed sheet replacement process, the grating units located on the left and right sides of the bed body 10 are used to monitor in real time whether the bed sheet is deviated during the replacement process. When the deviation of the bed sheet exceeds the preset critical value and is blocked by the grating transmitter 313 and the grating receiver 310, so that the light beam emitted by the transmitting tube in the grating transmitter 313 is blocked by the offset bed sheet, and then the grating receiver 310 sends a shading signal to the controller 20. The controller 20 controls the first servo electric cylinder 306 in the power unit to extend to a preset length, so that the power unit drives the pressure roller 308 to further press the bed sheet, and the further squeezed elastic pressure airbag 314 drives the switch unit to extend through two passive parts, so that the strip static switch terminal 323 contacts the dynamic elastic switch scraper 325, triggering the execution unit in the opposite direction of the offset of the bed sheet to perform friction pulling and deviation correction processing on the bed sheet.

[0043] When the grating unit detects that the bed sheet being replaced is offset, the second servo electric cylinder 311 in the execution unit in the direction opposite to the offset of the bed sheet is continuously and slowly contracted, so that the horizontal pulling roller 309 that moves horizontally performs friction pulling on the bed sheet, so that the offset bed sheet is gradually and smoothly corrected, thereby achieving the correction processing of the offset bed sheet.

[0044] Before the execution unit corrects the offset sheet, the pressing assembly further presses the sheet wound on the material roller 304, so that when the winding structure rolls up the sheet, the offset sheet is further pressed against the surface of the horizontal pulling roller 309 of the correction unit. When the correction unit pulls the offset sheet in the opposite direction of the offset to correct the offset, the friction between the horizontal pulling roller 309 and the sheet to be corrected increases. The greater friction helps to further enhance the correction effect of the execution unit on the offset sheet, thereby avoiding the situation in which the sheet slips and becomes difficult to correct during the correction process due to insufficient friction between the sheet and the sheet.

[0045] When the bed sheet is corrected and no longer blocks the monitoring light beam emitted from the grating unit, the controller 20 controls the first servo electric cylinder 306 that has been extended to a preset length to retract to its original length.

[0046] Reference Figures 6 to 10 , the embodiment of the present invention provides a bed sheet changing device with a deviation-correcting component, the passive component includes a cover component, a strip resistor 319 and two L-shaped forcing frames 317 arranged symmetrically on the left and right; The two L-shaped forcing frames 317 are connected to elastic scrapers 322, and the strip resistor 319 and the two elastic scrapers 322 are electrically connected to the winding machine 301; The L-shaped forcing frame 317 includes a vertical section and a horizontal section connected to the vertical section, and two elastic scrapers 322 are respectively connected to the two horizontal sections, and the vertical section and the horizontal section in the L-shaped forcing frame 317 are both made of insulating material; The elastic pressure airbag 314 is connected between the passive insulating slide 307 and the pressure roller 308; Elastic reset parts are arranged on the opposite back surfaces of the two vertical sections.

[0047] Reference Figures 6 to 10 The embodiment of the present invention provides a bed sheet changing device with a deviation correction member, wherein the cover member includes an insulating outer protective shell 315 connected to a side of a passive insulating slide 307 away from an elastic pressure airbag 314, a strip resistor 319 connected to a side of the passive insulating slide 307 away from the elastic pressure airbag 314, and the insulating outer protective shell 315 is covered on the outside of the strip resistor 319, and the free ends of two elastic scrapers 322 are both attached to the surface of the strip resistor 319; Two side seats 316 are symmetrically connected inside the insulating outer shell 315, and two L-shaped forced frames 317 are located between the two side seats 316; The passive insulating sliding seat 307 has two long grooves symmetrically formed thereon, and the vertical section and the side fixed seat 316 on the same side both pass through the corresponding long grooves, and the vertical section slides horizontally in the long grooves; The two vertical sections are respectively located on the left and right sides of the elastic pressure airbag 314 .

[0048] Reference Figures 7 to 9 The embodiment of the present invention provides a bed sheet changing device with a deviation-correcting member, wherein the elastic reset member comprises a guide post 318 connected to the vertical section of the L-shaped forcing frame 317, and the end of the guide post 318 away from the vertical section is slidably inserted on the side seat 316, and the guide post 318 is a rectangular parallelepiped structure; The guide column 318 is externally sleeved with a return spring connected between the vertical section and the side seat 316 , and under the elastic force of the return spring, the vertical section in the L-shaped forcing frame 317 is always in close contact with the surface of the elastic pressure airbag 314 .

[0049] Reference Figures 9 to 11 , an embodiment of the present invention provides a bed sheet changing device with a deviation-correcting member, the switch unit includes an insulating box 320, and an insulating cover plate 321 is connected to cover the opening of the end of the insulating box 320; A strip-shaped static switch terminal 323 is connected to the side of the insulating cover plate 321 facing the inside of the insulating box 320; An insulating guide rod 324 is inserted into the end of the insulating box 320 for horizontal sliding. One end of the insulating guide rod 324 extends into the insulating box 320 and is connected to a dynamic elastic switch scraper 325 which is arranged opposite to the strip-shaped static switch terminal 323. The other end of the insulating guide rod 324 is connected to the horizontal section of one of the L-shaped forcing frames 317, and the end of the insulating box 320 away from the insulating guide rod 324 is connected to the horizontal section of the other L-shaped forcing frame 317; When the return spring in the elastic return member is in an initial relaxed state, the dynamic elastic switch scraper 325 is not in contact with the strip-shaped static switch terminal 323 .

[0050] When changing the bed sheet, as the pressing assembly further presses the rolled bed sheet on the material roller 304, the elastic pressure airbag 314 in the elastic unit between the power unit and the pressure roller 308 is further squeezed. The elastic pressure airbag 314 that further elastically deforms drives the two L-shaped forcing frames 317 to move in opposite directions, and also synchronously drives the switch unit to extend, so that the strip-shaped static switch terminal 323 contacts the dynamic elastic switch scraper 325, triggering the execution unit in the opposite direction of the bed sheet deviation to correct the bed sheet, so that when the bed sheet is not deflected, the correction unit remains in a normally closed state and does not consume additional electrical energy.

[0051] As the elastic pressure airbag 314 undergoes further elastic deformation and drives the two L-shaped forcing frames 317 to move in opposite directions, the elastic scraper 322 also moves in opposite directions, so that a longer length of the strip resistor 319 is received between the two elastic scrapers 322, and the resistance value becomes larger, thereby reducing the current flowing through the winder 301, and the output power of the winder 301 also decreases. Subsequently, the winding speed of the winder 301 decreases, and the deviation rate of the bed sheet is slowed down during the deviation correction process of the bed sheet by the deviation correction unit, making it easier for the deviation correction unit to correct the deviated bed sheet, thereby further improving the deviation correction efficiency while ensuring the deviation correction effect.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bed sheet changing device with a deviation-correcting component, characterized in that: The invention comprises a bed body (10), a controller (20), a material roller structure, and a winding structure, wherein the winding structure comprises a winding machine (301) and two monitoring and correcting components arranged symmetrically on the left and right, wherein the monitoring and correcting components comprise a grating unit and an execution unit, and the material roller structure comprises a material roller (304) around which a bed sheet is wound, and a material pressing component for pressing the bed sheet is provided on the material roller (304); The pressing assembly comprises a fixed bracket (305), wherein a power unit, a pressure roller (308) and an elastic unit located between the power unit and the pressure roller (308) are respectively arranged in the fixed bracket (305), wherein the elastic unit comprises an elastic pressure airbag (314), wherein passive parts are arranged on both left and right sides of the elastic pressure airbag (314), wherein a retractable and movable switch unit is connected between the two passive parts, wherein a dynamic elastic switch scraper (325) and a strip-shaped static switch terminal (323) are respectively arranged inside the switch unit; The bed sheet wound on the material roller (304) passes through the surface of the bed body (10) and two execution units and is fixed on the roller of the winder (301). The two grating units are respectively located on the left and right sides of the bed sheet. When the offset bed sheet blocks the monitoring light beam of one of the grating units, the power unit drives the pressure roller (308) to further press the bed sheet. The further squeezed elastic pressure airbag (314) drives the switch unit to extend through two passive parts, so that the strip-shaped static switch terminal (323) contacts the dynamic elastic switch scraper (325), triggering the execution unit in the opposite direction of the bed sheet offset to correct the bed sheet.

2. The bed sheet changing device with a deviation-correcting member according to claim 1, characterized in that: The power unit comprises a first servo electric cylinder (306) and a passive insulating slide seat (307); The passive insulating slide (307) slides inside the fixed bracket (305), and one end of the first servo electric cylinder (306) is connected to the passive insulating slide (307), and the other end is connected to the end of the inner cavity of the fixed bracket (305).

3. The bed sheet changing device with a deviation-correcting member according to claim 2, characterized in that: The passive component comprises a cover member, a strip resistor (319), and two L-shaped forcing frames (317) arranged in a bilaterally symmetrical manner, and the two L-shaped forcing frames (317) are both connected to an elastic scraper (322); The L-shaped forcing frame (317) comprises a vertical section and a horizontal section connected to the vertical section, and the two elastic scrapers (322) are respectively connected to the two horizontal sections; The elastic pressure airbag (314) is connected between the passive insulating sliding seat (307) and the pressure roller (308); Elastic reset parts are arranged on the opposite back surfaces of the two vertical sections.

4. The bed sheet changing device with a deviation-correcting member according to claim 3, characterized in that: The cover component comprises an insulating outer protective shell (315) connected to a side of the passive insulating sliding seat (307) away from the elastic pressure airbag (314); Two side fixed seats (316) are symmetrically connected inside the insulating outer protective shell (315), and the two L-shaped forced frames (317) are located between the two side fixed seats (316); The passive insulating sliding seat (307) has two long slots symmetrically formed thereon, the vertical section and the side fixed seat (316) on the same side both pass through the long slots corresponding to the two, and the vertical section slides horizontally in the long slots; The two vertical sections are respectively located on the left and right sides of the elastic pressure airbag (314).

5. The bed sheet changing device with a deviation-correcting member according to claim 4, characterized in that: The elastic reset member comprises a guide column (318) connected to the vertical section of the L-shaped forcing frame (317), and one end of the guide column (318) away from the vertical section is slidably inserted on the side fixed seat (316); The guide column (318) is externally sleeved with a return spring connected between the vertical section and the side fixed seat (316), and under the elastic force of the return spring, the vertical section in the L-shaped forced frame (317) is always in close contact with the surface of the elastic pressure airbag (314).

6. The bed sheet changing device with a deviation-correcting member according to claim 4, characterized in that: The strip resistor (319) is connected to a side of the passive insulating sliding seat (307) away from the elastic pressure airbag (314), and the insulating outer protective shell (315) is arranged outside the strip resistor (319); The free ends of the two elastic scrapers (322) are both attached to the surface of the strip resistor (319).

7. The bed sheet changing device with a deviation-correcting member according to claim 3, characterized in that: The switch unit comprises an insulating box (320), and an insulating cover plate (321) is connected to cover an opening at the end of the insulating box (320); A strip-shaped static switch terminal (323) is connected to the side of the insulating cover plate (321) facing the inside of the insulating box (320); An insulating guide rod (324) is inserted into the end of the insulating box (320) for horizontal sliding, and one end of the insulating guide rod (324) extends into the interior of the insulating box (320) and is connected to a dynamic elastic switch scraper (325) arranged opposite to the strip-shaped static switch terminal (323); The other end of the insulating guide rod (324) is connected to a horizontal section of one of the L-shaped forcing frames (317), and one end of the insulating box (320) away from the insulating guide rod (324) is connected to a horizontal section of another of the L-shaped forcing frames (317); When the return spring in the elastic return member is in an initial relaxed state, the dynamic elastic switch scraper (325) is not in contact with the strip-shaped static switch terminal (323).

8. The bed sheet changing device with a deviation-correcting member according to claim 3, characterized in that: The material roller (304) in the material roller structure is connected below one end of the bed (10), and the fixed bracket (305) is connected to the material roller (304); The winding machine (301) in the winding structure is connected below the other end of the bed (10); The grating unit comprises a grating fixing frame (302) connected to one end of the bed (10) close to the winder (301), and the grating fixing frame (302) is respectively connected to a grating transmitter (313) and a grating receiver (310) arranged in an upper and lower manner; The two grating units are respectively located on the left and right sides of the end of the bed body (10).

9. The bed sheet changing device with a deviation-correcting member according to claim 8, characterized in that: The execution unit comprises a sliding frame (312), and a horizontal pulling roller (309) is connected inside the sliding frame (312); A second servo electric cylinder (311) is connected to the side wall of the sliding frame (312); one end of the second servo electric cylinder (311) away from the sliding frame (312) is connected to a bearing frame; and one end of the bearing frame away from the second servo electric cylinder (311) is connected to the bed body (10); The two sliding frames (312) are arranged symmetrically on the left and right, and are both horizontally slidably connected to one end of the bed (10) close to the winding machine (301).

10. The bed sheet changing device with a deviation-correcting member according to claim 9, characterized in that: The strip resistor (319) and the two elastic scrapers (322) are electrically connected to the winding machine (301); The controller (20) is connected to the bed (10), and the grating receiver (310), the first servo electric cylinder (306) and the second servo electric cylinder (311) are all electrically connected to the controller (20).

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